Brisbane does not observe Daylight Savings time in Australia, but has the same +10 UTC offset as Sydney, Canberra and Melbourne which may be useful for inserting the right timestamp if your server automatically adjusts for Daylight Saving.

Note that DateTimeZone::listIdentifiers(DateTimeZone::AUSTRALIA) contains a subset of the timezones listed on this page. Some of the timezones listed are kept for backwards compatibility only.

Australian Timezones with DateTimeZone::AUSTRALIAAustralia/AdelaideAustralia/BrisbaneAustralia/Broken_HillAustralia/CurrieAustralia/DarwinAustralia/EuclaAustralia/HobartAustralia/LindemanAustralia/Lord_HoweAustralia/MelbourneAustralia/PerthAustralia/Sydney

Australian Timezones with DateTimeZone::ALL_WITH_BCAustralia/ACTAustralia/AdelaideAustralia/BrisbaneAustralia/Broken_HillAustralia/CanberraAustralia/CurrieAustralia/DarwinAustralia/EuclaAustralia/HobartAustralia/LHIAustralia/LindemanAustralia/Lord_HoweAustralia/MelbourneAustralia/NSWAustralia/NorthAustralia/PerthAustralia/QueenslandAustralia/SouthAustralia/SydneyAustralia/TasmaniaAustralia/VictoriaAustralia/WestAustralia/Yancowinna

I could not find documentation to list when certain timezones were deprecated, but any timezone that only appears in the second list is for backward compatibility purposes only and could be removed in a future release of PHP.